Which of the following statements is not true about individual minerals?
A) The composition of different minerals varies only slightly.
B) Minerals can be produced by animals.
C) Minerals have an ordered structure.
D) Minerals can be synthetically manufactured.
Answer: D
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Which of the following was NOT a contributor to the collapse of Amerindian populations in Latin America
A) starvation due to a collapse of food production systems B) warfare C) epidemics (ex. influenza and smallpox) D) dramatic climate change during the period immediately following the arrival of Europeans E) forced labor
A positive curvature value means an upwardly ________ surface and a negative curvature value means an upwardly ________ surface:
A. convex, concave B. concave, convex
Wind-blown deposits of silt and clay are called:a
dunes. b. loess. c. ventifacts. d. yardangs. e. till.
Los Angeles, California, has this type of climate: ________
What will be an ideal response?